Hey...
4.2.2.2 is Verizon's DNS server and I always set it as my backup DNS server.
I would go to opendns.com as well. I run a linux router with open dns hard coded in and it's been perfect for me.
The ISP's in South America are running on some pretty janky infrastructure, and I agree her dynamically assigned DNS server from her ISP was most likely overloaded. Hence the static DNS entries from openDNS should resolve the issue.
You are right... as always.
Te amo!
